In Manson's case, his evil and insanity would require that the text be examined with special care for lies and inchoate thinking.
In Mother Theresa's case, we could be confident that she was telling the truth, even if we happened to disagree with her.
Vanden Heuvel is well known for taking a hard left line on just about everything, and doing everything she can to make her own country look bad. I would examine anything she says with special care.
Reread your own sentence - it is absurd.
Of course if one is not capable to evaluate what is being said or written one is doomed to to rely on personal trust.
Machiavelli stated:
"Three minds exist; one capable of thinking for itself; another able to understand others' thinking's; and a third that can do neither. The first mind is of the highest excellence, the second excellent, and the third worthless."